Influência do período de lactação na eficiência reprodutiva de fêmeas suínas

• Ano de defesa: 2003
• Autor(a) principal: Amaral Filha, Wald'ma Sobrinho
• Orientador(a): Costa, Eduardo Paulino da
• Banca de defesa: Donzele, Juarez Lopes , Torres, Ciro Alexandre Alves , Guimarães, Simone Eliza Facioni , Brustolini, Paulo César
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Medicina Veterinária
• Departamento: Biotecnologia, diagnóstico e controle de doenças; Epidemiologia e controle de qualidade de prod. de
• País: BR
• Palavras-chave em Português: Porca; Manejo reprodutivo; Lactação
• Palavras-chave em Inglês: Sows; Reproductive management; Lactation
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::REPRODUCAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5179

This experiment was carried out to verify the influence of the lactation period (LP) in the subsequent weaning-conception interval (WCI) and litter size (LS) in primiparous and multiparous sows at Ponte Nova region - MG. Seven year-old data were used (1996 - 2003) of eighteen farms you trade. In relation to alimentary diet of the lactic animals, it was composed of commercial ration and water ad libitum. A total of 79.729 parições were analyzed, divided in different lactation periods: 8 to 13 days, 14 and 15 days, 16 and 17 days, 18 to 21 days and 22 to 25. There was influence (P <0,05) of LP in WCI and in LS, so much for the multiparous as for the primiparous. In both groups LP from eight to 13 days, resulted in an adult (P <0,05) WCI, that was of 4,94 ± 0,8 days for the multiparous and 5,63 ± 0,5 days for the primiparous, when compared with other LP. So much for the multiparous as for the primiparous LP from 22 to 25 days, resulted in a smaller WCI (4,31 ± 0,1 and 4,67 ± 0,5 days, respectively) when compared to other LP. In relation to LS it was verified that a LP ultraprecocious (8 to 13 days) in multiparous, it resulted in smaller number born (P <0,05), that it was of 10,70 ± 0,5 pigs respectively, when compared with other LP. In relationship the primiparous, was observed that LS (10,3 ± 0,9 pigs) it was smaller (P <0,05) for LP from eight to 13 days, when compared with LP from 19 to 21 days and 22 to 25 days, where it was verified a LS of 10,68 ± 0,5 and 11,43 ± 0,8, respectively. So much for the multiparous as for the primiparous LP from 22 to 25 days, resulted in larger LS (11,87 ± 0,3 and 11,43 ± 0,8 pigs, respectively), when compared to other LP. Before the exposed, it can be concluded that the lactation period has influence in the weaning-conception interval and litter size, and the lactation period from 22 to 25 days (traditional weaning) it is the period that provides better results in the weaning-conception interval and litter size of the females swine.